package it.evento.controllers;

import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import it.evento.manager.OAuthManager;

import java.io.IOException;

/**
 *
 * @author Mark
 */
@WebServlet(urlPatterns = {"/OAuthController"})
public class OAuthController extends HttpServlet {

    /**
     * Processes requests for both HTTP <code>GET</code> and <code>POST</code>
     * methods.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {

        OAuthManager oam = new OAuthManager();

        response.setContentType("text/html;charset=UTF-8");
        try (PrintWriter out = response.getWriter()) {

            if (request.getParameter("code") != null) {
                String code = request.getParameter("code");
                System.out.println("Codice autorizzazione: " + code);
                oam.genCredential(code);

                response.sendRedirect("planning.jsp?auth=ok");
            } else if (request.getParameter("authenticate") != null) {
                String url = oam.getFlow().newAuthorizationUrl().setRedirectUri(oam.getRedirectUrl()).build();
                System.out.println("Please open the following URL in your browser then type the authorization code:");
                System.out.println(url);
                response.sendRedirect(url);
            }

        }
    }

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /**
     * Handles the HTTP <code>GET</code> method.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /**
     * Handles the HTTP <code>POST</code> method.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /**
     * Returns a short description of the servlet.
     *
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>

}
